Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 840c1b0d8cdeacb821e877ff47758e2530fed16ea09a794c394ea88c1fc10e73:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^